5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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When compared to BBO it features larger spectral and temperature acceptance, superior angle tolerance, plus a smaller walk-off angle. from 3289 $ supply
According to the evidence-of-principle experiment, the conversion effectiveness of 23% implied the possibility of reaching significant-electrical power at the next Stokes wavelength on the Raman laser. In case the pump laser of 1078 nm could be received at the standard electricity of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm may very well be more than 10 W. The design of the Raman laser cavity must be optimized so that you can stay away from the damage from the M1 and diamond surface.
The important thing challenge of ultraviolet coherent light source predominantly concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the conditions for frequency transformation, so The expansion, measurement, damage resistance, conversion performance and allowable parameter choice of nonlinear optical crystal are needed Increasingly more.
However, the beam good quality of the larger electric power DUV laser would become worse as a consequence of a lot more really serious thermal and nonlinear results. Consequently, the frequency conversion procedures should be carefully built to mitigate the aforementioned effects. Hence, a large-electricity DUV laser for the FHG of one μm with a fantastic beam top quality can be received and can be valuable for acquiring the shorter wavelength DUV lasers such as 193 nm by SFG.
LBO is also a fantastic nonlinear crystal which is often applied to the SHG within the NIR for the environmentally friendly. The DUV laser is normally understood by two phases of SFG inside the LBO crystals considering the fact that there's no period-matching angle for LBO to transform the green laser at 515 nm or 532 nm for the DUV specifically by SHG [sixteen]. Lately, the NSBBF crystal has also demonstrated its probable to acquire a higher conversion effectiveness from 532 nm to 266 nm. The stroll-off angle and deff with the NSBBF are almost much like Individuals of CLBO [seventeen].
On one other aspect, the power scaling with the NIR laser is an additional component to improve the typical ability on the 193-nm DUV laser. Because of the not enough the large-electric power amplification Remedy of your NIR laser (as an example at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) may very well be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength in addition to getting relative greater electricity [21]. Recently, a diamond Raman laser showed its means in reaching a significant power plus a significant conversion efficiency on the 1st Stokes on the one-μm laser [22,23], which means the possibility for being applied while in the 193-nm DUV laser technology because of its large Raman achieve and huge frequency change.
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While in the scientific and industrial apps, the beam quality in the DUV laser can also be an essential parameter. Specifically, the beam high-quality of the DUV laser dramatically impacts the laser machining success. The beam excellent from the DUV laser is determined by that of the basic laser plus the crystal with the frequency conversion. Just lately, a superior-electrical power DUV laser (>ten W) at 258 nm was claimed by using a beam high quality of M2 < one.five, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would bring on a far better laser machining result when compared with the previous DUV lasers with larger sized M2.
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The conversion performance from fundamental NIR to DUV is from 5% to 36% based on the described brings about Table 1. Escalating the conversion effectiveness will lessen the stress on the look and set up of the fundamental laser amplifier in addition to the electrical power consumption. An excellent beam good quality of the elemental laser can even add into the increasing from the conversion efficiency in addition to the appropriate electrical power intensity from the NIR and eco-friendly laser within the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by usage of CLBO crystal are 70% and all over 50%, respectively [12], which corresponds into the conversion performance of 35% from basic to DUV.
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